Typical Application for OM8508SF +5 Vin to +3.3 Vout @ 3A Ultra Low-Dropout Linear Regulator. The OM8508 is an ultra low dropout linear regulator designed specifically for hi-rel applications. Housed in either a 5 pin through hole or 8 lead surface mount package, these regulators provide high reliability in military/defense applications. The low dropout voltage of 0.4V @ 3A makes the part particularly useful for applications requiring low noise and higher efficiency